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The region at the base of the nucellus of an ovule; gives rise to the integuments.
(cell and molecular biology)
One of the paired, spiral, albuminous bands in a bird's egg that attach the yolk to the shell lining membrane at the ends of the egg.



the basal part of the ovule where the seed stalk attaches the ovule to the placenta.

References in periodicals archive ?
Robertson (1985) suggested that chalazae may be a useful synapomorphy shared by pyramidellids, architectonicids, and opisthobranchs.
The white string-like thing around the yolk ending in a small clump is a chalazae.
People who are new to farm-fresh eggs are often concerned about chalazae, the "cords" in egg whites.